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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!network.ucsd.edu!sdcc12!sdcc13!mtrostle
- From: mtrostle@sdcc13.ucsd.edu (Mark Trostler)
- Newsgroups: rec.audio
- Subject: Subwoofer power supply
- Message-ID: <42809@sdcc12.ucsd.edu>
- Date: 22 Dec 92 19:54:32 GMT
- Sender: news@sdcc12.ucsd.edu
- Organization: University of California, San Diego
- Lines: 28
- Nntp-Posting-Host: sdcc13.ucsd.edu
-
- Again a big hearty thanx to everyone who's helping me on this... ya
- just can't learn this stuff in school it seems... (it's much too
- practical)...
-
- Anyway, could someone tell me where in a power supply design the
- amout of output current get determined? I understand the
- transformer determines the voltage, diodes do the rectification and
- capacitors/inductors will handle the filtering (leaving the
- regulation for some lucky IC!) - but I don't see where the output
- current is determined (V=IR somewhere I assume). Is this equation
- true: Volts@primary supply x Amps@primary supply = Volts@other side
- of the transformer x Amps@other side of transformer x efficiency of
- transformer?
-
- Also (I swear this has something to do w/audio!) can I send my
- subwoofer amplifier more than 12V in a quest to give it 15amps or
- so?
-
- Finally, what is the current that comes out of a wall socket? I
- see it's 110VAC @ 60Hz, fine, but what's the current?
- But, does the amount of current not matter because the line current is
- isolated from the output current by the transformer? Is 110volts
- pulsating 60x/sec. all that's important to the transformer/rest of
- the power supply?
-
- THANK YOU EVERYONE WHO HAS A MUCH BETTER GRASP OF THIS STUFF THAN ME!
- & a big fat HAPPY HOLIDAYS to you all...
- Mark
-